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SAI INTERNATIONAL SCHOOL


                                                   CLASS -IV- SCIENCE


                                                 Chapter 13- Our Environment

                                                    Sub topic- Water Pollution





                                                    Waste from
                                                        home




                                 Throwing of                              Harmful
                                  wrappers                              substances




                                                  Water Pollution



                                  Throwing                              Waste from
                                 plastics into                           factories
                                    water

                                                      Chemical
                                                     substances
                                                       used by
                                                      farmers



               Notes:


               The addition of wastes from homes, industries and agricultural fields
               into the water bodies, thereby making the water unfit for use is known
               as water pollution.



                       •  Waste from home- The wastes such as plastic bags, wrappers
                          and cartons are thrown into ponds and river, which makes the
                          water dirty.

                       •  People who live near rivers and ponds- The people who live
                          near rivers and ponds pollute water by washing clothes and
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